Die cating machine



T. C. KORSMO DIE CASTING MACHINE y Filed Aug. 21, 1930 Sept. 20, 1932.

2 Sheds-Sheet 1 Sept- 20 1932- T. c. KoRsMo DIE CASTING MACHINE Filed Aug. 2l, 1950 2 Sheets-Sheet 2 Patented Sept 20, 1932 UNITE-'O STATES PATENT .o1-FICE *JJORBJORN C. xonsmo, OF MADISON, WISCONSIN, ASSIGNOR 'ro MADISON-Knr ConronA'rION, or MADISON, WISCONSIN, A CORPORATION or WISCONSIN DIE CASTING MACHINE Applicationv led August 21, 1,930. Serial No. 476,909.

`1o 23, '1926, and N0.'1,627,784f, of May 10, 1927,

although in no way limited thereto.

Generally speaking, the machine referred to comprises a separable die; a melting pot; g

a movable goose neck or pressure chamber for receiving the molten metal from the melting pot and conducting it tothe closed die; pressure fluid supply means for forcing the metal from the goose neck into the die; and automatic means for operating these parts in properly timed relation The pressure chamber or'goose neck is adapted for movement between two positions in one of which it receives a supply of molten metal from the melting pot and is'disconnected from the 25. pressure fluid supply, and in the other of which the pressure chamber is connected with both the die and the ressure fluid supply, for the purpose of orcibly injecting the metal into the die. 7

It is the purpose of the presenty invention to provide a die casting machine construction which insures proper and efficient connection between the goose neck and the pressure uid supply means at the desired time. To insure a tight joint or seal at this point, provision is made for floating or yieldably mounting the pressure fluid connection so that it will automatically accommodate itself to the fitting on theI goose neck. Compensation is'made .in this way for variations in the size of the vgoose neck and the associated parts due to temperature changes and for r any inaccuracies in dimensions of the parts. lThe floating mounting for the pressure 15 fluid connection is fully automatic in operation so that the connection is urged continuously into sealing engagement with the pressure fluid inlet to the goose neck'when the latter is in' casting position. The provisionA made for mounting the goose neck or p'reS- lerence is made for this purpose.

sure chamber also further insures proper registry of the pressure fluid outlet and the corresponding inlet to the goose neck 'when the parts are in the die charging position.

While reference has been made tothe ap- 55v plicability of the invention to machines of the character shown in my earlier patents,

supra, it likewise is intended for use in various other types of die casting apparatus.

The accompanying drawings illustrate the w preferred embodiment of the invention, and comprlse l Fig. 1, a side elevation of the construction with the goose neck or pressurev chamber shown in full lines in its elevated or die charging position, and in dotted lines in its lowered position to receive molten metal from the melting pot; and L Fig. 2,- a plan view of the same.

In order to disclose the invention fully, it is not'necessary to illustrate the separable die, nor the mechanism for operating the die` and the goose neck. However, general reference will be made to these parts and the manner in which they function during the operation of the machine. Details of construction and operation of such devices-are fully set forth in my. earlier patents, Nos. 1,607,677 and 1,627,784, supra, to which ref- Y In the drawings, 1 isthe melting pot which rests'on the bed of the machine (not shown) l Gooseneck or pressure chamber 2, which extends downwardly into melting pot 1 is pivotally supported at its rear or left hand end by a cross pin 3 extending through a perforated lug 4 provided on the goose neck for this purpose. 'Pin 3 is supported on either side of lug 4 in the perforated forvward-ends of bracketsf, 5'.. These brackets are suitably'sfsecured, as by machine screws 6, 6, to the upper face of support 7 carried by the base of the machine.

Goose neck 2 is hollow and the chamber 8 95 thereof communicates at its upper rear end with passage 9 extending through a pressure yfiuid .nozzle 10 suitably securedto the goose reference to the pressure fluid supply means, as will appear later.

The means for supplying the pressure fluid to the goose neck 2 will be described now. Mounted for horizontal movement and vertical adjustment on brackets 5, 5 is a pressure-luid-connection supporting member l2.

The right hand end of this member carries a pressure fluid connection or nipple 13 suitably mounted thereon. Nipple 13 has a horizontal. passage 14 therein, the right hand end of the passage being in the form of an outwardly flared or conical opening 15. An upright passage 16 connects the innerf end of passage 14 to. a pipe 17 leading to a suitable supply of pressure fluid, usually compressed air. Thus, it will be seen that the parts being in the full line die charging position of Fig. 1 with goose neck nozzle 10 engaging the recessed seat 15 of nipple 13, pressure fluid entering pipe 17 will pass through nipple 13 and nozzle 10 into the hollow goose neck. In this manner, as is well understood, molten metal contained in chamber 8 of the goose neck will be forced therefrom into the die which at this time is in communication with the opposite end or discharge nozzle of the goose neck (not v shown) In the operation of the machine, the metal discharge end of goose neck 2 is adapted to dip into the molten metal in pot 1 to receive a supply of metal therethrough, the pres; sure fluid connection between nozzle 10 and nipple 13 being broken 'at this time (see dotted line position of Fig. 1) to permit the exhausting of any gases from chamber 8 and ready entrance of the metal into the goose neck. The goose neck is then swung upwardly to the full line position of Fig. 1.

This movement brings the metal discharge end of the goosel neck into communication with `the die, and at the same time effects the pressure fluid connection at the left hand end of the goose neck. Pressure fluid is then released to this connection and the molten metal forced into the die.

Itis to be noted particularly that as goose neck 2 swings^upwardly about pin 3 from its lowered metal receiving position .to die charging position, pin 3 serves by reason of lits mounting in supporting brackets 5, 5

to accuratelyguidenozzle 10 and pressure fluid connection 13 into registry with each other. Complete alinement and sealing of these members is accomplished as a result of the coaction of the conical seat 15 of the ,air connection and the rounded end 11 of the. goose neck nozzle 10. j

The means for permitting horizontal movement and vertical adjustment of the pressurefluid-connection supporting member 12 will be described now. Inasmu'ch as this construction is duplicated on either side of member 12, only the forward set will be described,

the correspondingparts at the rear being indicated by primed numbers. Located on either side of member 12 and suitably mounted in each bracket 5 is a. pair of adjusting screws 18, 18. Eachscrew 18 has a lower adjusting nut 19 and an upper adjusting nut 20. Screws 18 are each provided with a head or guide block 21. Extending loosely through horizontal openings in these blocks is a guide rod 22. At its right hand en d the rod 22 is suitably secured, as by means of a set screw 23, in an extension 24 projecting laterally from the end of supporting member 12.

A second laterallyprojecting extension 25 is provided at the left hand end of supporting memebr 12. This extension 25 has a threaded opening 2G therethrough to receive an externally threaded tubular guide and stop member 27. Stop member 27 is openv at its right hand end and telescopes with the adjoining end of .guide rod 22. The outer end of stop member 27 is provided with a head 28, whereby it may be adjusted back and forth in extension 25. When the parts move to the right, ends 29v vof stop members 27 engage with the adjacent guide blocks 21. In this manner, movement of the parts to the right is limited, but may be varied as desired by adjustment of stop member 27. Nut

30 serves to lock the stop member in adjusted position.

Vertical adjustment of supporting meml"ber 12 in order to aline nipple 13 with nozzle support 12 by reason ofthe slidable connecf tion between guide rods 22, 22 and the stationary guide blocks 21, 21, 21, 21. In this way compensation is made for any inaccuracies in the. dimensions of goose neck 2 and its inlet nozzle 10, and for any variations in the size of these parts resulting from temperature changes. These naturally take place, since the partsare subjected to considerable heat, from the melting pot and the molten metal passing therethrough.

Similar gravity operated means are provided on each side of supporting member 12 for continuously urging the support and its nipple 13 towards the right. This is for the purpose of insuring a complete tight seal at all times during the casting operation bctween nipple 13 and air inlet nozzle 10.

A cross bar 31 is suitably secured, as byv le carrying member 12. The parts now to e descrlbed being` duplicated on either side of the member 12, only that at the front will beset forth in detail. Threaded through the forward end of bar 31 is a vertically disposed-adjusting screw 33 having a head 34 and a lock nut 35. The. lower end of screw 33 is swiveled at 36 in a vertically disposed wedge member 37. This wedge contacts at one side and is guided by supporting member 12. Member 12 also has an extension 39 with whichwedge 37 engages to transmit move- -ment to member 12. Extension 39 has a groove 40 in which a rib 41 on the wedge operates to guide the wedge during vertical adjustment by screw 33.'

A short cross shaft 42 is mounted for rotation in the upper part of bracket 5. The inner end of this shaft is provided with an eccentric 43. This is in the form of a trunnion located olf center of shaft 42. The trunnion carries a freely rotatable roller 44 whichi engages with the inclined surface 45 of wedge 37. The outer end of shaft 42'carries a lever 46 fast thereto. This lever has a weight 47 slidably mounted thereon, by means of washers 48 and machine'screws 49. Thus, -weights 47, 47 acting on their respective levers, tend to rotate shafts 42, 42 in a counterclockwise direction. Asa result, rollers 44, 44 on the inner ends of the shafts are at all times forced against wedges 37, 37 to urge member 12 and-its nipple `13 toward the right. v

With this arrangement, as goose neck 2 moves from its dotted line position of Fig. 1 toward its -full line die charging position, nozzle 10 engages with the seat .15 of nipple 13. The upward swinging movement of the goose neck then continues a short distance further, until the metal discharge end of the goose neck (not shown) is in proper registry with the die, which has closed in the meantime. During this short additional movement of goose neck 2, nozzle 10 forces nipple support 12 to the left and wedges 37, 37 against rollers 44, 44. Hence, since these rollers are mounted on eccentric trunnions 43, 43', there results a movementof shafts 42, 42 in a clockwise direction against the resistance of levers 46, 46 and their weights 47, 47. This movement continues until goose neck 2 reaches its full line position of Fig. 1 at which time-it is in Alcommunication with The ratio of the distance vbetween the center o f weight 47 and the center of shaft 42 to that between the center of roller 44 and the center of sha-ft 42 being so great, the contact effected between nozzle 10 and nipple 13 is sufficient at all times to'withstand the pressure of the compressed air which is now passed frompipe17 through nipple 13l and into the goose neck. Regulation of the degree of force with which nozzle 10 and nipple 13.

' are held in contact may be accomplished by shifting the weights 47, 47 on their levers. Preferably, entrance of the pressure fluid into goose neck 2 and the exhausting of gases from the connections is effected automatically byvalves actuated by the goose neck and die operating mechanism while the goose neck is in casting position.

After shooting, the casting, the goose neck swings downwardly into the metal. At the start of this movement, the connection between the vgoose neck and the die is broken first, then shortly thereafter the connection between nipple 13 and nozzle 10 is broken (see dotted line position of Fig. 1).

During the first partof the 'downwardmovement of the gooseneck 2, pressure fluid nipple 13 moves to the right with nozzle 10, because of the action of weights 47, 47.

However, as soon as stops 27, 27 strike guide blocks 21, 215, this vmovement of nipple 13 ceases and the seal is broken as the goose neck continues its swinging movement.

It is obvious that when a new goose neck is placed in position on the pivot pin 3, any inaccuracies in its dimensions will not result in a failure to effectI a complete seal between nozzle 10 and nipple 13. Whether the goose neck be smaller or larger than the standard goose neck used, the oating mounting of the nipple 13 will at all times cause the nipple 13 tobe urged into -intimate contact with the goose neck nozzle 10. Likewise, as temperature changes affect the goose neck and the associated parts so as to change their dimensions more or less, these will be compensated for by means of the automatic movement of nipple 13 either to the leftor to the right to accommodate itself to the changed conditions.

What is claimed is 1 1. In a casting apparatus, the combination of a die charging member adapted for movement between operative and inoperative positions; a pressure fluid conducting member adaptedfor sealing connection with Athe die charging member when in its operative position; and" cam means acting on said pressure fluid conducting member for effecting such connection.l

2. The combination in a die casting machine of a frame having guide blocks thereon; a supporting member having a guide rod mounted on either side thereof and extending through said guide blocks; a pressure fluid -connection carried by said supporting member; pressure fluid conducting means comand its connection into engagement with the' goose neck.

3. The combination in a die casting machine of a support; a casting carrying a pressure fluid connection; a pair of adjusting screws connected to either side of the casting and mounted in said support; and a pressure chamber inounted for movement between two positions, in one of which it is forced into sealing engagement with said pressure iiuid connection. v

4. The combination in a die casting machine of a support; a pair of adjusting screws located at either side thereof; guide blocks on the upper ends of the adjusting screws; a pressure iiuid connection; a carrying member therefor; uide rods on either side of the carrying member and extending through the guide blocks; a pivoted pressure chamber adapted for movement into its operative position in sealing engagement with the pressure iiuid connection; and means for urging the connection carrying member into engagement with the pressure chamber.

5. The combination in a die casting machine of a support; a pressure uidconnection mounted for horizontal movement therev on; a carrying member for said connection; guide blocks mounted4 on the support; guide rods on either side ofthe carrying member and extending through the guide blocks; means on the guide rods adapted to engage the guide blocks and limit th'e movement of the carrying member and its connection; a pressure chamber mounted for movement into operative position to sealingly engage the pressure fluid connection; and means for urging the connection carrying member towards the pressure chamber.

6. The combination in a casting apparatus of/a support; movable pressure fluid conduct-- ing means mounted thereon; cam means urging said pressure fluid conducting means in one direction; gravity operated means for 'actuating the cam means; and a die/.charging member which in its operatlve position forc1- bly engages the pressure fluid means in op position to the action of said cam means thereon, whereby to'effect .tight sealing enn gagement between said die charging member and the pressure Huid conducting means.

7. In a casting apparatus, the combination of a pivoted goose neck; a reciprocable pressure fluid conducting means adapted for connection with the goose neck when the latter is inoperative position; a shaft having an ec centric portion engaging said conducting means; and means tending to rotate said shaft so as to urge said pressure fluid conducting means in one direction, the goose neck engaging with thel pressure fluid conducting means,

when the former isA in its operative position,

to urge said conducting means in the opposite direction.

8. In a die casting machine, the combination of apressure fluid connection mounted for eciprocatory movement; a pair of shafts,

one on each side of the connection, each provided with an eccentric portionl engaging said connection; a lever xed on each of said shafts; a weight adjustably mounted on each of said levers to urge said connection in one direction; and a pivoted goose neck adapted4 for sealing engagement with the pressurek fluid connection when moved to its operative position.

9. In a die casting machine, the combination of a support; a movable pressure iiuid connection mounted thereon; cam means; adjustable wedge means on the pressure fluid connection with which the cam means engage to urge said connection inv one direction; means for operating the cam means; and a movable die charging member which, when moved towards operative position, forcibly engages the pressure fluid connection in opposition to the action of said cam means thereon to effect sealing engagement between said member and the pressure iiuid connection.

10. The combination in a die casting machine of a support; a pressure fluid connection mounted for movement thereon; eccentrically mounted vrollers on the support engaging with said connection; a movable pressure chamber adapted in its operative position forcibly to engage said pressure fluid connection; and means operating said rollers to hold the fluid pressure `connection in sealing engagement with the pressure chamber in th operative position of said chamber.

11. The combination ina die casting machine of a support; a goose neck pivoted on said support for movement between operative and inoperative positions; a movable pressure fluid connection mounted on said support and with which the goose neck engages when in operative position; and lever means pivoted on said support, said lever means including a portion acting on said connection to force the connection'into sealing engagement withV the goose neck.

12. The combination in a die casting machine of a support; a goose neck pivoted on said support for movement between operative and inoperative positions; a movable pressure fluid connection mounted on said- 18. In a die casting machine, the combinai tion of a support; a pressure fluid connection mounted for vertical adjustment and horizontal movement on said support; means for vertically adjusting said connection; a pressure chamber mounted on said support and adapted for sealing engagement with said pressure fluid connection; and automatic means onsaid support for continuously urging the pressure fluid connection in a direction for effecting such engagement with the pressure chamber. I y

14. The combination in a casting apparatus of a support; a pressure chamber mounted on said support and adapted for movement between operative and inoperative positions; a movable pressure fluid connection mounted on said support and adapted toybe forced into tight engagement with said pressure chamber when the pressure chamber is in its operative position; means urging the pressure fluid connection into such engagement with the pressure chamber; and adjustable wear-compensating means interposed between they fluid connection and said urging means therefor.

15. In a die casting machine, the combination of a support; a pressure fluid connection mounted 'for vertical adjustment on said support; a pressure chamber movably mounted on said support and adapted for sealing engagement with one side of said pressure fluid connection; means for vertically adjusting said side of the pressure fluid connection; and means for eifecting independent vertical adjustment of the opposite side of said connection.

In testimony whereof I have signed my Y name to this specification.

TORBJORN C. KORSMO. a 

